Spark returns incorrect result when 'collect()'ing a cached Dataset with many columns

SPARK_HOME <- path.expand("~/Library/Caches/spark/spark-2.0.0-bin-hadoop2.7")
Sys.setenv(SPARK_HOME = SPARK_HOME)

library(SparkR, lib.loc = c(file.path(Sys.getenv("SPARK_HOME"), "R", "lib")))
sparkR.session(master = "local[*]", sparkConfig = list(spark.driver.memory = "2g"))

n <- 1E3
df <- as.data.frame(replicate(n, 1L, FALSE))
names(df) <- paste("X", 1:n, sep = "")

tbl <- as.DataFrame(df)
cache(tbl) # works fine without this
cl <- collect(tbl)

identical(df, cl) # FALSE